WO2009083006A1 - Méthode de détection de la charge provenant d'un éclair - Google Patents

Méthode de détection de la charge provenant d'un éclair Download PDF

Info

Publication number
WO2009083006A1
WO2009083006A1 PCT/DK2008/000443 DK2008000443W WO2009083006A1 WO 2009083006 A1 WO2009083006 A1 WO 2009083006A1 DK 2008000443 W DK2008000443 W DK 2008000443W WO 2009083006 A1 WO2009083006 A1 WO 2009083006A1
Authority
WO
WIPO (PCT)
Prior art keywords
wind turbine
charge
detection apparatus
lightning
receptor
Prior art date
Application number
PCT/DK2008/000443
Other languages
English (en)
Inventor
Hans Vagn Erichsen
Original Assignee
Vestas Wind Systems A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vestas Wind Systems A/S filed Critical Vestas Wind Systems A/S
Priority to EP08867468.4A priority Critical patent/EP2225810B1/fr
Priority to US12/810,666 priority patent/US9450392B2/en
Priority to DK08867468.4T priority patent/DK2225810T3/en
Priority to CN2008801275697A priority patent/CN101960687A/zh
Publication of WO2009083006A1 publication Critical patent/WO2009083006A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/30—Lightning protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
    • H02G13/60—Detecting; Measuring; Sensing; Testing; Simulating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/307—Blade tip, e.g. winglets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/80—Diagnostics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention generally relates to detection of lightning in relation to a wind turbine.
  • Damages related to strokes of lightning can lead to destruction of vital parts of at wind turbine both in large parts as e.g. blades but also in smaller electronic parts. This destruction of parts in a wind turbine can result in elevated costs throughout the lifetime of the wind turbine because of expensive maintenance of the wind turbine and loss in production of electricity.
  • damage caused by strokes of lightning in wind turbines using receptors to receive lightning is cracks in the blade of the wind turbine around the part of the receptor which receives the energy (electric current, voltage, charge, etc.) from lightning.
  • damage invoked may be deterioration of the receptors.
  • a problem of state-of-the-art wind turbines is that the above-mentioned damages must be checked manually.
  • This manual inspection of e.g. receptors in the surface of a blade has a tendency to be inaccurate e.g. because it is done by means of binoculars and furthermore the manual inspection is costly.
  • such inspections may not necessarily result in the discovering of all faults on e.g. receptors.
  • the invention relates to a detection apparatus of a wind turbine
  • said wind turbine comprises a down-conducting system
  • said detection apparatus comprises a charge measurement apparatus for establishment of a charge representation of charge induced into said down- conducting system by lightning and wherein said detection apparatus further comprises an estimator for estimating deterioration of one or more components in a wind turbine on the basis of said charge representation.
  • charge representation covers charge originating from lightning as well as any parameter representative of charge. .
  • a preferred way of establishing a charge representation is to measure the current and then convert the results obtained into charge.
  • components covers all parts of a wind turbine which may be damaged when a lightning strokes a wind turbine. Such parts may e.g. be receptors, down conducting systems, lightning current transfer unit, blades, insulation of electronics and cables, control electronics and power electronics or any not mentioned parts of a wind turbine
  • the detection apparatus comprises in an embodiment of the invention an estimator for estimating the deterioration of components in the wind turbine on the basis of charge derived from e.g. a current measurement measured in a down-conducting system by means of the charge measurement apparatus.
  • An estimator uses the measured data to predict when a component has to be replaced or maintained or to create more reliable data of the effect of lightning striking a wind turbine.
  • the estimator may e.g. predict deterioration for components as e.g. receptor, blades, lightning current transfer unit, insulation of electronics and cables, down conducting systems, control electronics and power electronics.
  • the estimator and the charge measurement apparatus of the detection apparatus may advantageously share the same data processor or merged together on the same print.
  • the detection apparatus comprises in an advantageous embodiment of the invention a charge measurement apparatus for measuring charge originating from lightning which can be used to predict deterioration of some components in a wind turbine because deterioration of some components in a wind turbine can be derived as a function of conducted current induced by lightning.
  • the measured data from the charge measurement apparatus can also be used for other purposes such as creating databases or statistics related lightning striking a wind turbine.
  • a detection apparatus is present in combination or connection with the down- conducting system and may be located inside or outside of the wind turbine.
  • the detection apparatus comprises various components required for carrying out the specific detection task required from the detection apparatus.
  • the deterioration may be avoided or directed to components, e.g. components of the down-conducting system, instead of components which may be very expensive or difficult to repair/replace.
  • the down-conducting system may e.g. be designed according to conventional design principles.
  • said one or more components forms at least a part of the down-conducting system.
  • said one or more components comprises a receptor and/or a lightning current transfer unit.
  • the receptor may typically be arranged in the tip of the blade.
  • the lightning current transfer unit may e.g. form part of the down-conducting system at positions where a transfer of lightning-induced current between mutually moving or movable parts of the wind turbine is required. According to a preferred embodiment, such lightning current transfer unit may be applied in the transition between the receptor-mounted blade and the nacelle and furthermore between the nacelle and the tower.
  • said estimation of deterioration of one or more components is based on an accumulation of charge established by said detection apparatus.
  • said down-conducting system comprises at least one galvanic connection from a receptor to a ground connection.
  • the down-conducting system comprises at least one connection from a location at the top of the wind turbine, where a lightning may strike and down through the wind turbine to a ground connection which conducts current induced by lightning to ground.
  • the down-conducting system may comprise different parts of the wind turbine. Non- limiting examples of different parts may e.g. be receptors, wire or bar in the blade, lightning current transfer units between blade and hub, joining means in the hub or nacelle, wire or bar down through the tower and a bar or plate as ground connection.
  • the individual construction parts of the wind turbine may by used as part of the down-conducting system.
  • Non-limiting examples may be built in metal reinforcement in a blade, a metal tower or foundation of the wind turbine, etc.
  • Part of the down-conducting system may in a preferred embodiment of the invention be rotating.
  • the down-conducting system may be formed, at least partly inside the wind turbine to obtain a better protection from the environment in which the wind turbine is located.
  • the down-conducting system may be fed at least partly outside the wind turbine to obtain a better insulation from the sensitive electronics inside the wind turbine.
  • the down-conducting system comprises joining means e.g. close to the root of the blades, inside the hub between the nacelle and the tower.
  • the joining means joins the part of the down-conducting system from each blade of the wind turbine in a galvanic connection.
  • the joining means may also be referred to as a lightning current transfer unit.
  • the galvanic connection comprises in an advantageous embodiment of the invention at least partly an electrically conducting material.
  • the galvanic connection may comprise a conductive material, preferably a conductive metal, to lower the electrical resistance so that the current induced by lightning is guided through the intended connection to the ground connection and not e.g. the individual construction parts of the wind turbine.
  • the electrically conductive material comprises in an advantageous embodiment of the invention at least partly one metal selected from the group of conductive metals Cu, Fe, Al, Ag, Au, Ni, Pb, Sn 5 Hg or alloys or any combination thereof.
  • the conductive material is from the group of metals with good conductance so that the electric resistance in the connective wire will be as low as possible.
  • said at least one receptor is located at the upper end of the wind turbine.
  • the term upper end of the wind turbine covers a receptor located on the tower or at a pole at the tower, on the nacelle or at a pole at the nacelle or at one or more of the blades of the wind turbine or any combination thereof.
  • More than one receptor may be located at different locations at the wind turbine, these locations include the nacelle or any kind of poles in connection thereto, blades or tower or any combination thereof.
  • the at least one receptor is in an advantageous embodiment of the invention located at the surface of each blade of the wind turbine.
  • the receptor may be incorporated so that the receptor is part of the surface of the blade of the wind turbine.
  • the at least one receptor on each blade may be located in the vicinity of the tip of each blade to secure that a receptor is always at the top of the wind turbine, which increases the possibility that lightning strikes at a receptor and not elsewhere at the wind turbine.
  • the at least one receptor is in an advantageous embodiment of the invention located on each side of the blade.
  • said charge measurement apparatus is coupled to said down-conducting system.
  • the charge measurement apparatus may be connected to the down-conducting system by means of an optical measurement apparatus, a Rogowski coil or other measurement apparatus or any combination thereof to obtain the best possible measurement.
  • One or more charge measurement apparatus may preferably be located e.g. inside one or more of the blades, typically near the root of the blade.
  • Alternative positions of the charge measurement apparatus may also be applied within the scope of the invention, e.g. in the hub, in the nacelle or anywhere in the tower.
  • the most optimal place in a wind turbine to place the charge measurement apparatus depends on the type of wind turbine wherein the charge measurement apparatus is to be used. For most types of wind turbines the most optimal place in the wind turbine to place the charge measurement apparatus is presently at the root of the blade which allows individual measurements of charge in relation to each blade.
  • the charge measurement apparatus may be located in the lower part of the tower of the wind turbine.
  • the charge measurement apparatus is not limited to be located at this location. It should, however, be noted that alternative positioning preferably should be configured to enable individual measurements of the receptors or at least to be able to locate the blade in which the lightning stroke.
  • said charge measurement apparatus measures the current fed through said down-conducting system as a result of lightning.
  • the presently preferred charge representation may be obtained by means of an electrical measurement which is subsequently converted to a charge representation by the measurement apparatus or other suitable data-processing equipment, such as an estimator communicating with the measurement apparatus.
  • the charge measurement apparatus measures the current in the down-conducting system, e.g. current induced by lightning.
  • said charge measurement apparatus comprises at least one optical measurement apparatus.
  • the charge measurement apparatus is based on Faraday rotations which allows establishing charge.
  • said charge measurement apparatus comprises at least one Rogowski coil.
  • the charge measurement apparatus is based on the principle of the Rogowski coil which allows measuring of the current induced by lightning by surrounding the down-conducting system by a coil and thereby not needing any galvanic connection between the down-conducting system and the charge measurement apparatus.
  • the measurement apparatus is arranged at least partly in the blade.
  • the measurement apparatus is arranged to be comprised at least partly in each blade of the wind turbine.
  • said estimator comprises means for data processing, treatment of analogue or digital measure results, storing, displaying, interfacing and/or any combination thereof.
  • Components of the estimator may e.g. comprise means for data processing or treatment of analogue measure results, means for storing, means for comparing, means for displaying, means for communication and other components required to comply with requirements for the charge measurement system.
  • the estimator may comprise different components and may be housed in the same housing as the detection apparatus.
  • the estimator can be located outside the housing of the detection apparatus, e.g. in the tower, blade, nacelle or outside the wind turbine.
  • said estimator is estimating service life of components in a wind turbine.
  • the estimator can predict if a component in a wind turbine has to be replaced or maintained, based on the amount of charge conducted through the down-conducting system.
  • said storing means stores or accumulates at least some of said measured data from said charge measurement apparatus.
  • the storing means may comprise a data-processing unit and store measured data for further data processing.
  • the further data processing can e.g. help to predict different events in the wind turbine and create statistics of e.g. frequency of lightning strikes the wind turbine and/or simply save data for future use.
  • the means for communication may send out a warning message of critical condition of components in the wind turbine.
  • the storing means may comprise a data processing unit which may be housed in the same housing as the detection apparatus.
  • the storing means comprises data storage of predefined critical deterioration values of at least one component in connection with the wind turbine.
  • said accumulated data is compared with said predefined critical deterioration values of the component in connection with the wind turbine to indicate at least two maintenance levels of the component in connection with the wind turbine.
  • the comparing means determines on the basis of predefined and measured values the state of a component in the wind turbine.
  • the state of the components in the wind turbine may be defined by different maintenance levels.
  • the maintenance levels may be defined by the amount of charge a component e.g. a receptor can conduct before it breaks or destroys itself or other components in the wind turbine.
  • An example of three maintenance levels may be divided as follows: one level indicating non critical condition of components, a second level indicating critical condition of components, a third level indicating maintenance or replacement of components.
  • said display means is capable of displaying all data handled by said detection apparatus and said charge measurement apparatus.
  • the display means is e.g. displaying results of the comparison of measured data and predefined data, stored data, warnings, graphic user interface and other data required to be displayed.
  • the detection apparatus comprises means for interfacing with other internal or external data processing units, controllers, computers, etc.
  • the means for interfacing can be used to communicate measured data in a wind turbine or wind power plant if e.g. the wind turbine or wind power plant comprises more than one charge measure apparatus.
  • the means for interfacing can also be used if e.g. the data storage is not located in the same housing as the charge measuring apparatus. Then the measured data can be sent to the data storage from the charge measure apparatus.
  • the means for interfacing in connection with charge measurement apparatus or data storage makes it possible to send measured data to a central data processing unit located in the wind power park, at a central location among a plurality of wind power parks or in a central maintenance building, e.g. at another location.
  • the means for interfacing communicates the condition of at least one component in connection with the wind turbine to a central data processing device.
  • the central data processing device can e.g. be a computer system located in a monitoring office where the means for interfacing communicates the condition of components in the wind turbine, e.g. at a predefined time or if a person in the monitoring office asks for this knowledge. This is very advantageous because a field engineer does not have to go to maintain a wind turbine unless some components have to be maintained.
  • the communication between the interfacing means and other internal or external interfaces may advantageously be wireless or implemented by galvanic or optical cables.
  • the invention relates to a method for establishing deterioration of a component of a wind turbine or a wind turbine power plant comprising the steps of measuring the charge induced into a component by lightning, establishing an accumulation of the measured charge and relating the accumulation of charge to a degree of deterioration of said component.
  • the invention relates to a method implemented in a detection apparatus according to any of the claims 1-18.
  • the invention relates to a system comprising at least two wind turbines, each of the wind turbines comprising a detection apparatus.
  • a preferred way of establishing a charge representation is to measure the current and then convert the results obtained into charge.
  • the invention relates to a wind turbine comprising a detection apparatus according to any of the claims 1-18.
  • fig. 1 illustrates a front view of a large modern wind turbine
  • fig. 2 illustrates a front view of a wind turbine according to an embodiment of the invention
  • fig. 3a-c illustrates different types of receptors on a blade of a wind turbine
  • fig. 3 d-f illustrates a cross sectional view of a receptor of the type illustrated in figure 3a
  • fig. 4 illustrates a blade of a wind turbine comprising more than one receptor and with a measuring apparatus positioned according to a preferred embodiment of the invention
  • fig. 5 illustrates a wind turbine from a side view, illustrating two lightning current transfer units according to an embodiment of the invention
  • fig. 6 illustrates a wind turbine from a side view, with a receptor located on a pole on the nacelle according to an embodiment of the invention
  • fig. 7 illustrates a flow diagram of events happening when lightning strikes in a wind turbine according to an embodiment of the invention
  • fig. 8 illustrates a block diagram of the communication between pluralities of wind turbines over a network to a central data processing unit
  • fig. 9 illustrates a block diagram of the communication between a plurality of wind power parks over a network to a central data processing unit
  • fig. 1 OA and B illustrates elements of a receptor
  • fig. 1 IA-G illustrates in cross-sectional view, a number of embodiments of receptors where the exterior surface is provided with one or more field enhancing protrusions.
  • Figure 1 illustrates a modem wind turbine 1.
  • the wind turbine 1 comprises a tower 2 positioned on a foundation.
  • a wind turbine nacelle 3 with a generator is placed on top of the tower 2 by means of yaw bearings.
  • a shaft extends out of the nacelle front and is connected with a wind turbine rotor through a wind turbine hub 4.
  • the wind turbine rotor comprises at least one rotor blade, e.g. three rotor blades 5 as illustrated.
  • Figure 2 illustrates a wind turbine 1 with three rotor blades 5 and one receptor 6 on each of the rotor blades 5.
  • Each of the rotor blades comprises a down-conductor 7 electrically connected at a first end 7 A to a receptor and at a second end 7B to a first lightning current transfer unit 9 A.
  • the down-conductor may e.g. be formed by a wire.
  • the first Lightning Current Transfer Unit 9A is again electrically connected to ground 10 via the nacelle, a second lightning current transfer unit 9B and a Protective Earth-wire 1 1 (Protective Earth-wire; PE-wire).
  • the connection from the blades to the nacelle via the lightning current transfer unit is preferably applied to avoid that the main shaft is not forming a part of the down-conduction system.
  • the hub may form part of the down-conducting system.
  • the above-mentioned down-conductor 7, the first lightning current transfer unit 9A, the second lightning current transfer unit 9B and PE-wire 11 - optionally in parallel with a galvanic conductive tower - are connected to form a galvanic connection through which current induced by lightning may be led to ground 10 and this connection will in the following be referred to a down-conducting system 30.
  • the purpose of this down-conducting system is to bypass current induced by lightning to a ground connection 10 with a minimized risk of damages to components of the wind turbine.
  • the PE-wire 11 may e.g. comprise a protection earth cable.
  • the part of the down-conducting system leading from the nacelle down to ground may preferable be formed e.g. by the mentioned PE-wire together with the tower of the nacelle if a conductive tower is applied.
  • the basic point is that there needs to be a connection from the nacelle to ground. This connection may obviously be formed by other configurations of conductors and/or wires.
  • a down-conducting system may typically include the receptor(s) 6.
  • connections of the down-conducting system 30, e.g. the PE-wire 11 may be shared by different down-conducting systems, e.g. the three illustrated systems, if so desired.
  • Other configurations and types of conductors used in the configuration are possible within the scope of the invention.
  • wires may e.g. be exchanged by solid leads and other suitable alternatives.
  • the down-conducting system 30 may be terminated in a ground connection 10 which may be implemented as a spear or bar conducting the current originating from lightning into the ground.
  • a ground connection 10 which may be implemented as a spear or bar conducting the current originating from lightning into the ground.
  • This implementation may especially be advantageous at locations where the subsoil makes it possible to pound or dig the spear or bar sufficiently deep into the subsoil.
  • the down-conducting system 30 may also be terminated in a ground connection implemented as a web or a plate. This may especially be advantageous at locations where the subsoil is very hard, e.g. consists of rocks, where the plate does not have to go as far down into the subsoil as the spear or bar.
  • the ground connection 10 may be implemented as part of the foundation of the wind turbine or may be carried out as a combination of the mentioned solutions.
  • the illustrated embodiment of the invention furthermore comprises a detection apparatus 12 which again comprises a charge measurement apparatus 13 and a deterioration estimator 14.
  • the detection apparatus 12 is an apparatus comprising circuitry and units required for carrying out the measurement of current induced by lightning 8 and fed through the down-conducting system 30 and further data-processing of the measured data or treatment of analogue measure results.
  • the detection apparatus 12 may moreover comprise displays, printout facilities, communication interfaces, etc.
  • the estimator 14 of the detection apparatus 12 may e.g. comprise means for data processing or treatment of analogue measure results, data storing arrangement, means for comparing, one or more displays, communication circuitry and other components required to comply with requirements for the charge measurement system.
  • a plurality of charge measurement apparatus 13 may be used if desired.
  • the charge measurement apparatus 13 is basically used to establish different electric measures directly representing or derived from lightning striking a wind turbine. These electric measures may e.g. be current, and from this the charge induced and originating from lightning can be derived.
  • the detection apparatus 12 comprises a charge measurement apparatus 13 measuring current induced by lightning in the down-conducting system 30 and then transmitting the measured data to the estimator 14 in the detection apparatus 12 which, in the present embodiment, processes the measured data dependent on requirements to the system into the desired accumulated charge representation.
  • the estimator 14 in the detection apparatus 12 may comprise or communicate with a storing device where the measured data are stored, a data processing unit which adds new measurements to already stored measurements from past lightning strikes and then stores the accumulated data, a data processing unit which compares the accumulated data with predefined data representing the amount of charge that a component in a wind turbine, e.g. a receptor 6, can resist before it has to be replaced, and one or more display(s) to display e.g. the condition of components in the wind turbine, e.g. a receptor, accumulated data, estimated time to replacement of components in the wind turbine 1 or other data required to be displayed by the system.
  • a storing device where the measured data are stored
  • a data processing unit which adds new measurements to already stored measurements from past lightning strikes and then stores the accumulated data
  • a data processing unit which compares the accumulated data with predefined data representing the amount of charge that a component in a wind turbine, e.g. a receptor 6, can resist before it has to be replaced
  • estimation algorithms may be applied in relation to an estimator according to the invention as long as the injected charge related to a certain component of the wind turbine is captured to establish a charge history applicable for establishment of an accumulation of relevant charge. This accumulated charge may be applied directly or be processed further for the purpose of establishing a deterioration estimate related to a specified component of the wind turbine or a component related thereto.
  • the algorithms referred to as accumulative may e.g. include integration on a continuous basis, summing of discrete measures and the algorithms may of course comprise other relevant processing operations.
  • this estimate may be applied for the purpose of real-time monitoring the state of the wind turbine and relevant components thereof and moreover it may be applied for the purpose of establishing a prediction in relation to the components' life-time, requirement for maintenance etc.
  • This monitoring may be performed remote or on-site.
  • the state of the components in the wind turbine may be defined by different maintenance levels.
  • the maintenance levels may be defined by the amount of charge that a component, e.g. a receptor can be subjected to before the deterioration induced due to lightning will lead to damages of e.g. the receptor or the surrounding blade.
  • the maintenance level may e.g. comprise a simple accumulative measure of charge representing the degree of deterioration.
  • the maintenance level of one type of receptor is listed below:
  • the mentioned maintenance level may vary.
  • the level which triggers actions such as maintenance may be determined e.g. by the type of receptor, the owner of the wind turbine, service agreement, geographical location (some areas are more exposed to lightning than other), etc.
  • the estimator 14 may include data storage(s), signal processor(s), display means and communication interface(s) in several housings or one shared housing.
  • the estimator 14 stores and accumulates charge and compares the measured data with pre-stored critical deterioration data for components, e.g. a receptor, in the wind turbine. In this way the estimator may calculate when e.g. a receptor is deteriorated in a degree that it has to be maintained or replaced. This can be done by displaying a warning on the display means or by sending a message to a central data processing unit located in the wind power park or e.g. in a service central at another location.
  • the detection apparatus 12 may be coupled to the down-conducting system and may be located everywhere in the wind turbine 1, e.g. in the nacelle 3, blade 5, hub 4 or as in a preferred embodiment of the invention in the tower 2 where it is easy to access.
  • the detection apparatus 12 comprise more than one charge measurement apparatus 13 and, if required, more estimators 14.
  • the estimator 14 may e.g. comprise any desired and/or required units such as data processors, storages, communication interfaces, GUI's (GUI; Graphic User Interface) such e.g. display, keyboard, pointer means or any combination thereof.
  • the detection apparatus 12 may be located within the same housing as the charge measurement apparatus 13 but this is not always an advantage. Some of the components of the estimator 14 can be shared with other parts of the control system of the wind turbine 1.
  • One example is the storing and/or displaying means, if these means are already implemented in e.g. the central control and available for this purpose.
  • the charge measurement apparatus 13 may preferably be located in a blade 5.
  • All the required components of the detection apparatus 12 may be housed within the same housing. This would allow prefabricated detection apparatuses and ease installing the detection apparatus 12 in the wind turbine because no large means for interfacing is needed between the individual components within the housing of the detection apparatus which makes installation faster. When all components of the detection apparatus is housed in the same housing it also eases service of the detection apparatus because all components are accessible from the same location. All the required components of the detection apparatus may be distributed and not within the same housing.
  • This also allows sharing of components in the detection apparatus 12 with other parts of the wind turbine.
  • One not limiting example could be a communication unit used by e.g. one of the controllers controlling different parts of the wind turbine.
  • Figure 3a-c illustrates a close view of different types of receptors 6 located on or at the tip of a blade 5, e.g. the blade of fig. 2 with the down-conductor 7 leading the current induced by lightning towards the ground connection 10.
  • Figure 3 a illustrates the receptor 6 as integrated in the blade 5 such that the receptor 6 comprises part of the surface of the blade 5.
  • a part 15 is illustrated where the surface of the receptor 6 is deteriorated by a lightning 8. If no action is taken to repair or change the receptor, the missing part 15 of the surface of the receptor 6 can lead to one or more cracks 16 in the surface of the blade 5.
  • the estimator 14 of fig. 2 may then establish a representation of this deterioration on the basis of charge determination and accumulation thereof and avoid e.g. more complex investigations, such as visual inspection, etc.
  • the missing part 15 may e.g. be depressions in the receptor 6 formed, by means of the force from the attack of a lightning 8 which may melt or evaporate part of the receptor 6.
  • receptors 6, such as those illustrated on figure 3b and 3 c may be used.
  • the receptors illustrated on figure 3b and 3c is formed in such way that the tip of the blade 5 is covered by a cap, made of a conductive material, preferably a metal.
  • Metal such as copper or aluminium is preferred because of their high conductance, but of course other materials such as carbon could also be used.
  • the embodiment illustrated on figure 3b illustrates the cap as a closed cap and the embodiment illustrated on figure 3c illustrates the cap as a mesh. It should be noted that almost any design of such cap would have the effect of a receptor as illustrated in figure 3a.
  • Figure 3d-e illustrates different designs of the receptor 6 illustrated on figure 3a, in a cross sectional view. Of course these three designs are not limiting for the design of the receptor 6.
  • the receptor 6 is equipped with a thread 27 which facilitates a connection between the receptor 6 and the down-conductor 7.
  • the receptor 6 is screwed into a bed which is galvanic connected the down-conductor7.
  • the amount of deterioration of the receptor 6 depends on the amount of charge in the lightning 8. Hence if the charge is measured during a period of time and then integrated the result (the area under the charge curve) is the amount of charge in the lightning. Different receptors may withstand different amount of charge before they are damaged in a way which requires maintenance. Therefore each type of receptor 6 may be tested in laboratories to find out the amount of charge they can withstand. As an alternative hereto the amount of charge which a receptor may withstand is deduced from experience or common general knowledge of the skilled person.
  • the result of the above mentioned integral is then compared to the amount of charge which the receptor can withstand and the result of this comparison determines how damaged the receptor is.
  • Figure 4 illustrates a further embodiment of the invention where a blade 5 of a wind turbine 1 comprises two receptors 6 and 6Aa combined with the down-conductor 7.
  • the receptors 6 and 6a are both connected to and forming part of a down-conducting system 30 and located as described above as an integrated part of the surface of the blade 5.
  • the receptor 6 A is combined with the rest of the down-conducting system 30 by means of a part 7C of the down-conductor 7.
  • the embodiment includes a preferred arrangement of a detection apparatus, namely where a charge measurement apparatus 13 is positioned in the blade, near the root and where an estimator 14 is positioned in the hub 4.
  • the charge measurement apparatus 13 comprises a number of measuring units, one located in each blade (not shown) in order to facilitate individual measurement in relation to each blade.
  • the measurements are then communicated to the estimator 14 in the hub, and the estimator 14 therefore gathers and handles the measurements from all the measuring units, e.g. three if the wind turbine is three-bladed.
  • the configuration and positioning of the components may be chosen to fit the requirements and may vary within the scope of the invention.
  • different parts of the detection system may communicate by means of wired or wireless connections.
  • Figure 4 illustrates how two receptors 6 and 6A can be located on a blade 5, but other possible numbers of receptors 6 and locations on the blade 5 can be chosen e.g. closer to or at the tip of the blade 5, closer to or at the root of the blade 5 or any location there between.
  • a receptor 6 may also be located at one side of the blade 5 while another receptor 6 is located at the other side of the same blade 5.
  • a detection apparatus 12 (not shown) or at least some of the elements of a detection apparatus 12 (not shown) may be located close to and connected to the down-conductor.
  • each receptor on the wind turbine is connected to a detector.
  • this detector may be connected wireless or be means of cable to a detection apparatus 12 placed e.g. in the tower. In this way, it may be possible to avoid charge measurements performed in the blade as charge may be measured in relation to a common shared part of the down-conducting system.
  • the detection apparatus 12 may be located in the root of each of the blades 5 of the wind turbine according to a preferred embodiment of the invention.
  • FIG. 5 illustrates the at least two lightning current transfer units 9A and 9B which are part of the down-conductor system 30.
  • the first lightning current transfer unit 9 A comprises a sliding galvanic connection between the blade 5 near the root-end and the nacelle and may comprise a ring in the root of the blade 5 and collector shoe at the nacelle creating a sliding galvanic connection between the blade 5 and the nacelle.
  • This mechanism has the advantageous feature that no matter at which pitch angle the blade 5 is located there is always galvanic connection between the blade 5 and nacelle.
  • the lightning current transfer unit 9A is not illustrated in details in this figure.
  • the second lightning current transfer unit 9B comprises a sliding galvanic connection between the nacelle near the bottom of the nacelle to the tower by establishing a sliding galvanic connection between the nacelle and the tower, allowing galvanic connection even when the yaw bearing turns the nacelle.
  • the lightning current transfer unit 9B is not illustrated in details in this figure.
  • Figure 6 illustrates another embodiment of the invention where a wind turbine 1 is illustrated from at side view, with the nacelle 3 on top of the tower 2.
  • the at least one receptor 6 is placed on a pole or bar 17 to arrange the receptor 6 higher than the nacelle 3 and higher than the receptor 6 illustrated in figure 5.
  • One or more receptors may be located in connection with the nacelle 3 and combined with a further receptor(s) 6 located in the blade 5.
  • Current induced by lightning is conducted through the blade 5 by a part of the down-conducting system 30, down to the root of the blade 5 where the current is conducted to a joining arrangement in the hub 4 by means of a lightning current transfer unit 9.
  • the one or more receptor(s) 6 located at or in connection with the nacelle is connected directly or via suitable arrangements to the PE-wire 11 which conducts the current induced by lightning down into the ground by means of the ground connection 10.
  • FIG. 7 illustrates a flow diagram illustrating an embodiment of the invention.
  • current induced by lightning is lead through the down-conducting system 30 to the ground connection.
  • the current induced by lightning is measured in step 19 by the charge measurement apparatus.
  • the amount of charge measured is accumulated in step 20 by the estimator over time.
  • the accumulated charge representation induced by lightning is then compared in step 21 with pre-stored critical deteriorative values of components, e.g. a receptor in a wind turbine.
  • an action 22, 23 or 24 is chosen e.g. according to the above-described predefined measurement levels and in step 25 sent to a central data processing unit.
  • the different measurement levels describe the condition of components, e.g. a receptor in the wind turbine. If a critical measurement level is reached, the central data processing unit communicates that maintenance is required at the wind turbine.
  • An action may thus be established as e.g. immediate requests, predictive requests or "no-action- required".
  • the flow diagram illustrated on figure 7 illustrates one embodiment of the invention where three measurement levels are dedicated to certain actions. In other embodiments of the invention a different number of measurement levels and associated actions may be applied. Different measurement levels may be required for different components in the wind turbine and consequently the number of measurement levels are depending on the requirements of the chosen measurement system.
  • FIG 8 illustrates a block diagram of communication between pluralities of wind turbines, e.g. wind turbines in a wind power park or stand-alone wind turbines, over a network 26 to a central data processing unit 25.
  • Each single wind turbine WTl, WT2, WT3,... WTn has a detection apparatus 12 installed to measure current induced by lightning striking the wind turbine. As described above these measurements can be accumulated and, if necessary, stored by components of the estimator 14 of the detection apparatus 12. If necessary, it is possible to send the measurements via a communication network 26 to a central data processor unit 25 where the condition of components in the wind turbine 1 can be read or stored.
  • the central data processor unit 25 may be placed inside or outside one of the pluralities of wind turbines or in a building away from the wind turbines.
  • the estimator 14 in the detection apparatus 12 may e.g. comprise a communication unit which communicates through a communication network e.g. the actual condition of components in the wind turbine 1, e.g. a receptor 6, accumulated data, estimated time to replacement of components in the wind turbine 1 and other data required to be displayed by the system to e.g. other wind turbines, wind power parks or central data processing units.
  • a communication network e.g. the actual condition of components in the wind turbine 1, e.g. a receptor 6, accumulated data, estimated time to replacement of components in the wind turbine 1 and other data required to be displayed by the system to e.g. other wind turbines, wind power parks or central data processing units.
  • the central data processing unit may e.g. be a computer system located in a monitoring office where the means for interfacing communicates the condition of components in the wind turbine, e.g. at a predefined time or if a person in the monitoring office asks for this knowledge. This is very advantageous because a field engineer does not have to go to maintain a wind turbine unless some components have to be maintained.
  • FIG 9 illustrates a block diagram of communication between pluralities of wind power parks (WPP; Wind Power Park) over a network 26 to a central data processing unit 25.
  • WPP Wind Power Park
  • Each single WPP (WPPl, WPP2, WPP3,..., WPP7) comprises a plurality of wind turbines WT measuring current induced by lightning as described under figure 8.
  • the individual WPP may comprise one or more central data processing units 25, one or more detection apparatus 12 or any combination thereof.
  • the measured data is sent to the network 26 e.g. by components of the estimator 14 of the detection apparatus 12 installed in each single wind turbine WT in the wind power park WPP as illustrated in WPP3 and WPPn.
  • the measured data is sent to the network 26 from a central data processing unit 25 in the wind power park as illustrated in WPPl and WPP2.
  • the central data processing unit 25 can be placed inside or outside the wind power park or in a central building away from the wind turbine.
  • the Rogowski coil is an electrical device which e.g. is used for measuring alternating current or high-speed current pulses. It consists of a helical coil wrapped around the straight conductor whose current is to be measured.
  • a Rogowski coil Since a Rogowski coil has an air core rather than an iron core, it has a low inductance and can respond to fast-changing currents and because it has no iron core to saturate, it is highly linear even when subjected to large currents such as current from lightning. Another advantage from using the Rogowski coil is that when it is correctly formed with equally spaced windings, it is largely immune to electromagnetic interference.
  • a further and preferred implementation of a measuring apparatus within the scope of the invention is optical and based on the theory of the Faraday rotation.
  • the Faraday Effects used in fiber optic magnetic field sensing is a magnetically induced circular birefringence.
  • a linearly polarized light travelling in the direction of a magnetic field experiences a net rotation.
  • All crystalline materials exhibit the Faraday Effect but its magnitude varies considerably and may be enhanced by choosing a sensing element with a large Verdet constant (constant of the magneto optic material). Fibers with a large Verdet constant exist but a long propagation path is then necessary to obtain measurable effects.
  • FIG. 1 OA schematically illustrate a lightning receptor 6 arranged in the rotor blade 5.
  • the material of the lightning receptor is of a carbon nanotube metal composite material.
  • the material of the lightning receptor is of a carbon nanotube metal composite material.
  • only a part of the lightning receptor may be of a carbon nanotube metal composite material.
  • an upper part may be of a carbon nanotube metal composite material, whereas the lower part may be of a standard light receptor material, such as a metal or metal alloy.
  • the part comprising carbon nanotube metal composite material may be the part facing the exterior of the wind turbine rotor blade.
  • the receptor is schematically illustrated as being connected to a down-conductor 7 for leading away any currents from a lightning strike.
  • the lightning receptor may be connected to a down-conductor in any suitable way.
  • the lightning receptor may be fixed in the rotor blade by any suitable means.
  • the lightning receptor is secured in a holder unit 29.
  • the carbon nanotubes may be substantially homogeneously distributed in the receptor, and the carbon nanotubes may be substantially randomly oriented in the entire thickness 30 of the receptor. In the illustrated embodiment, at least a portion of the carbon nanotubes are in physical contact with each other 31.
  • the scope of the embodiment is not limited to the embodiment shown in the Figure.
  • homogeneously distributed carbon nanotubes are preferred over inhomogeneously distributed carbon nanotubes.
  • the homogeneity is typically across the entire size of the receptor, thus at small size-scale, small compared to the size of the receptor, the distribution of the carbon nanotubes may be somewhat inhomogeneous.
  • the carbon nanotubes need not be randomly oriented and need not be in physical contact with each other. Orienting the nanotubes, e.g. along the direction along the thickness 30 of the receptor, however may improve the material properties of the receptor even further.
  • Carbon nanotubes may be provided with a large variety of lengths.
  • the carbon nanotubes may be of different lengths, as well as a given carbon nanotube metal composite may be provided with carbon nanotubes exhibiting a length distribution.
  • Figure 1OB schematically illustrate a further embodiment of a lightning receptor 6 arranged in the rotor blade 5.
  • the lightning receptor is at an exterior surface provided with a layer 32 of carbon nanotubes.
  • the insert 33 schematically illustrates an enlargement of the layer 32, where the enlargement schematically illustrates individual carbon nanotubes 34 protruding from the exterior surface 35 of the lightning receptor.
  • the receptor is schematically illustrated as being connected to a down-conductor 7 for leading away any induced currents from a lightning strike.
  • the lightning receptor may be connected to a down-conductor in any suitable way.
  • the lightning receptor may be fixed in the rotor blade by any suitable means.
  • the lightning receptor is secured in a holder unit 29.
  • Figure 11 schematically illustrates in cross-sectional view, a number of embodiments of receptors 6 arranged in a rotor blade 5, where the exterior surface of the receptors is provided with one or more field enhancing protrusions.
  • the scope of the invention is not limited to the embodiments shown in the Figure, any type of field enhancing protrusions within the scope of the invention is possible.
  • the schematic illustrations are not accurate representations in the sense of engineer or technical drawings. The illustrations are merely provided in order to illustrate various features of embodiments of the present invention. The illustrated embodiments provide examples of specific field enhancing protrusions.
  • a single centrally placed tip- shaped field enhancing protrusion is illustrated, the tip-shaped protrusion is pointing generally outwards from the exterior surface and is extending the entire exterior surface.
  • a single centrally placed tip- shaped field enhancing protrusion is illustrated, the tip-shaped protrusion is pointing generally outwards from the exterior surface and is extending a central part of the exterior surface.
  • the rising surface 36 of the protrusion is illustrated to be a straight or plane surface.
  • Other embodiments include, but are not limited to, concave or convex rising surfaces.
  • a single centrally placed arc- shaped field enhancing protrusion is illustrated, the arc-shaped protrusion is protruding generally outwards from the exterior surface and is extending the entire exterior surface.
  • a single centrally placed arc- shaped field enhancing protrusion is illustrated, the arc-shaped protrusion is protruding generally outward from the exterior surface and is protrusion is extending a central part of the exterior surface.
  • the rising surface 37 may also be provided with an angle in order to provide protrusion having a truncated cone shape.
  • the rising surface especially in the truncated cone embodiment, may be of a concave or convex rising shape.
  • the one or more field enhancing protrusions constitute a generally wave-shaped exterior surface.
  • the wave-shape may e.g. be circularly symmetric around a centre point, i.e. the field enhancing protrusions may be build up of a central crest and two concentric crests.
  • the central wave-formed protrusion comprises a larger amplitude than the wave-formed protrusion position away from the centre.
  • all the wave-formed protrusions comprise the same amplitude.
  • the size of the lightning receptor may be in the centimetre (cm) range, such as possessing a diameter or other relevant width in the range of 0.5 to 5 cm, such as 1.5 cm.
  • the height of the field enhancing protrusions may be in the range between some millimetre (mm) to a few centimetres, such as a between 1 mm to 10 mm, or larger.
  • the down-conductor 7 is preferably located in the interior of the blade 5. Furthermore it is obvious that a person skilled in the art is able to combine one or more of the above mentioned embodiments to receive at an embodiment, which is optimal for a problem to be solved.
  • Nanotubes in physical contact 31 Layer of nanotubes 32

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

L'invention porte sur un appareil de détection placé sur une éolienne munie d'un système conduisant à la terre le courant induit par un éclair. Ledit appareil comporte un dispositif de mesure de la charge établissant une représentation de la charge induite par l'éclair dans ledit système. Ledit appareil de détection comporte en outre un estimateur des dégâts provoqués par l'éclair sur un ou plusieurs des composants de l'éolienne, sur la base de ladite représentation.
PCT/DK2008/000443 2007-12-28 2008-12-22 Méthode de détection de la charge provenant d'un éclair WO2009083006A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP08867468.4A EP2225810B1 (fr) 2007-12-28 2008-12-22 Méthode de détection de la charge provenant d'un éclair
US12/810,666 US9450392B2 (en) 2007-12-28 2008-12-22 Method for detection of charge originating from lightning
DK08867468.4T DK2225810T3 (en) 2007-12-28 2008-12-22 Method for detecting lightning arising from lightning
CN2008801275697A CN101960687A (zh) 2007-12-28 2008-12-22 源自闪电电荷的检测方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200701887 2007-12-28
DKPA200701887 2007-12-28

Publications (1)

Publication Number Publication Date
WO2009083006A1 true WO2009083006A1 (fr) 2009-07-09

Family

ID=40627403

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2008/000443 WO2009083006A1 (fr) 2007-12-28 2008-12-22 Méthode de détection de la charge provenant d'un éclair

Country Status (5)

Country Link
US (1) US9450392B2 (fr)
EP (1) EP2225810B1 (fr)
CN (1) CN101960687A (fr)
DK (1) DK2225810T3 (fr)
WO (1) WO2009083006A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011048203A1 (fr) * 2009-10-22 2011-04-28 Phoenix Contact Gmbh & Co. Kg Dispositif de mesure d'un courant de foudre dans un mât d'éolienne
EP2439562A1 (fr) * 2010-10-08 2012-04-11 PHOENIX CONTACT GmbH & Co. KG Système de détection de foudre
EP2466321A1 (fr) * 2010-12-15 2012-06-20 General Electric Company Système, procédé et appareil de détection des éclairs
US8327710B2 (en) 2010-07-29 2012-12-11 General Electric Company System for estimating a condition of non-conductive hollow structure exposed to a lightning strike
WO2013077794A1 (fr) * 2011-11-23 2013-05-30 Aktiebolaget Skf Procédé et agencement de surveillance l'état d'un système de rotation
EP2551517A3 (fr) * 2011-07-28 2015-06-17 Vestas Wind Systems A/S Pale de turbine éolienne et système de mesure des éclairs
WO2015131900A1 (fr) * 2014-03-06 2015-09-11 Global Lightning Protection Services A/S Système de mesure de foudre pour une turbine éolienne
WO2017036793A1 (fr) * 2015-09-04 2017-03-09 Dehn + Söhne Gmbh + Co. Kg Dispositif de détection de paramètres de courant de foudre sur des installations munies d'un ou de plusieurs parafoudres et de trajets de dérivation du courant de foudre
CN107271120A (zh) * 2016-03-31 2017-10-20 波音公司 导电体通路系统和制造其的方法
DE102018100492A1 (de) * 2018-01-11 2019-07-11 Wobben Properties Gmbh Verfahren zum Erfassen von Blitzeinschlägen in einem Windenergieanlagen-Rotorblatt und Blitzeinschlagmesssystem

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2535265T3 (es) * 2009-04-30 2015-05-07 Vestas Wind Systems A/S Red en turbina eólica
CN102792240B (zh) * 2009-11-16 2016-06-01 Nrg系统股份有限公司 用于基于条件的维护的数据获取系统
JP5535886B2 (ja) * 2010-11-30 2014-07-02 三菱重工業株式会社 落雷検出装置、これを備えた風車回転翼および風力発電装置
US8239150B2 (en) 2011-05-16 2012-08-07 General Electric Company System, device, and method for detecting electrical discharges on a structure
US8258773B2 (en) * 2011-06-09 2012-09-04 General Electric Company System for detecting lightning strikes on wind turbine rotor blades
EP2756187B1 (fr) * 2011-09-14 2016-06-08 Ogin, Inc. Système de protection contre la foudre de turbine à fluide
EP2944809B1 (fr) * 2011-12-29 2018-04-25 Vestas Wind Systems A/S Procédé de fabrication d'une pale d'éolienne
FR3016042B1 (fr) * 2013-12-30 2017-03-03 Flakt Solyvent-Ventec Systeme et procede d'aide au diagnostic de l'etat de fonctionnement d'une machine tournante
JP6504662B2 (ja) * 2015-07-28 2019-04-24 国立大学法人静岡大学 落雷電荷量推定方法及びシステム
US20170058869A1 (en) * 2015-08-27 2017-03-02 General Electric Company Conduit assembly for a lightning protection cable of a wind turbine rotor blade
DE102017100785B4 (de) * 2017-01-17 2021-05-12 Dehn Se + Co Kg Vorrichtung zur Blitz- oder Gewitterwarnung
EP3652434A1 (fr) 2017-07-11 2020-05-20 Polytech A/S Système de détection et d'évaluation de foudre et procédé de détection d'emplacement de foudroiements sur une pale d'éolienne
EP3462200A1 (fr) * 2017-09-27 2019-04-03 SSB Wind Systems GmbH & Co. KG Dispositif de mesure du courant de foudre
US10650296B2 (en) 2018-02-13 2020-05-12 Erico International Corporation Mobile card reader for lightning protection systems
JP6838181B1 (ja) * 2020-02-26 2021-03-03 三菱重工業株式会社 風車翼
EP3916412A1 (fr) * 2020-05-28 2021-12-01 Ventus Engineering GmbH Procédé et système pour la surveillance et le diagnostic d'un système de mise à la terre
WO2022268276A1 (fr) 2021-06-25 2022-12-29 Vestas Wind Systems A/S Détection de coups de foudre sur une éolienne à fiabilité améliorée

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001033234A1 (fr) * 1999-11-03 2001-05-10 Vestas Wind Systems A/S Detecteur de courants electriques haute intensite
FR2848351A1 (fr) * 2002-12-06 2004-06-11 Duval Messien Paratonnerre a amorcage equipe de moyens de maintenance distants
WO2004111686A1 (fr) * 2003-06-12 2004-12-23 Lm Glasfiber A/S Enregistrement de decharges de foudre dans une eolienne
EP1754887A1 (fr) * 2005-08-17 2007-02-21 General Electric Company Dispositif de détection d'endommagement par la foudre dans une pale d'éolienne

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940607A (en) * 1974-12-09 1976-02-24 The United States Of America As Represented By The Secretary Of The Navy Photo-electric lightning detector apparatus
US5621309A (en) * 1996-02-21 1997-04-15 Electric Power Research Institute Method for detecting a failed ZnO disk in a surge arrester network
JP2006275845A (ja) * 2005-03-30 2006-10-12 Toko Electric Corp 雷撃電流計測装置
JP5072427B2 (ja) * 2007-05-11 2012-11-14 三菱重工業株式会社 風力発電装置及びその受雷エネルギレベル判定方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001033234A1 (fr) * 1999-11-03 2001-05-10 Vestas Wind Systems A/S Detecteur de courants electriques haute intensite
FR2848351A1 (fr) * 2002-12-06 2004-06-11 Duval Messien Paratonnerre a amorcage equipe de moyens de maintenance distants
WO2004111686A1 (fr) * 2003-06-12 2004-12-23 Lm Glasfiber A/S Enregistrement de decharges de foudre dans une eolienne
EP1754887A1 (fr) * 2005-08-17 2007-02-21 General Electric Company Dispositif de détection d'endommagement par la foudre dans une pale d'éolienne

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011048203A1 (fr) * 2009-10-22 2011-04-28 Phoenix Contact Gmbh & Co. Kg Dispositif de mesure d'un courant de foudre dans un mât d'éolienne
US8327710B2 (en) 2010-07-29 2012-12-11 General Electric Company System for estimating a condition of non-conductive hollow structure exposed to a lightning strike
EP2439562A1 (fr) * 2010-10-08 2012-04-11 PHOENIX CONTACT GmbH & Co. KG Système de détection de foudre
WO2012045873A1 (fr) * 2010-10-08 2012-04-12 Phoenix Contact Gmbh & Co. Kg Système de détection de la foudre
EP2466321A1 (fr) * 2010-12-15 2012-06-20 General Electric Company Système, procédé et appareil de détection des éclairs
EP2551517A3 (fr) * 2011-07-28 2015-06-17 Vestas Wind Systems A/S Pale de turbine éolienne et système de mesure des éclairs
US9835141B2 (en) 2011-07-28 2017-12-05 Vestas Wind Systems A/S Wind turbine blade and a lightning measurement system therein
US9803618B2 (en) 2011-11-23 2017-10-31 Aktiebolaget Skf Monitoring and fault prediction in relation to a mechanical component of a rotating system
WO2013077794A1 (fr) * 2011-11-23 2013-05-30 Aktiebolaget Skf Procédé et agencement de surveillance l'état d'un système de rotation
US10302679B2 (en) 2014-03-06 2019-05-28 Global Lightning Protection Services A/S Lightning measuring system for a wind turbine
WO2015131900A1 (fr) * 2014-03-06 2015-09-11 Global Lightning Protection Services A/S Système de mesure de foudre pour une turbine éolienne
WO2017036793A1 (fr) * 2015-09-04 2017-03-09 Dehn + Söhne Gmbh + Co. Kg Dispositif de détection de paramètres de courant de foudre sur des installations munies d'un ou de plusieurs parafoudres et de trajets de dérivation du courant de foudre
US10852339B2 (en) 2015-09-04 2020-12-01 Dehn Se + Co Kg Method for sensing lightning-current parameters at installations having one or more capturing devices and lightning-current diversion paths
CN107271120A (zh) * 2016-03-31 2017-10-20 波音公司 导电体通路系统和制造其的方法
DE102018100492A1 (de) * 2018-01-11 2019-07-11 Wobben Properties Gmbh Verfahren zum Erfassen von Blitzeinschlägen in einem Windenergieanlagen-Rotorblatt und Blitzeinschlagmesssystem
WO2019137977A1 (fr) 2018-01-11 2019-07-18 Wobben Properties Gmbh Procédé servant à détecter des coups de foudre dans une pale de rotor d'éolienne et système de mesure de coups de foudre

Also Published As

Publication number Publication date
EP2225810B1 (fr) 2017-06-07
CN101960687A (zh) 2011-01-26
US9450392B2 (en) 2016-09-20
DK2225810T3 (en) 2017-07-24
EP2225810A1 (fr) 2010-09-08
US20100280797A1 (en) 2010-11-04

Similar Documents

Publication Publication Date Title
EP2225810B1 (fr) Méthode de détection de la charge provenant d'un éclair
CA2749507C (fr) Systeme de mesure pour un conducteur de descente d'une pale d'eolienne
EP2551517B1 (fr) Pale de turbine éolienne et système de mesure des éclairs
JP5041424B2 (ja) ブレード雷撃監視装置および風力発電設備
EP1754887A1 (fr) Dispositif de détection d'endommagement par la foudre dans une pale d'éolienne
US20140093373A1 (en) System and method for detecting lightning strikes on a wind turbine
JP6778366B2 (ja) ダブルダウンコンダクタシステム、ダブルダウンコンダクタシステムを用いた落雷判定システム、及び風力発電装置
SE518250C2 (sv) Anordning och system för övervakning av en eller flera till ett elkraftnät anslutna avledare
CN112219029A (zh) 用于风力涡轮机的传感器装置
CN103017828A (zh) 微风振动对输电线路导线疲劳损伤的在线监测系统
CN109891092A (zh) 用于风力涡轮机叶片上的雷击的位置检测的雷电检测和测量系统及方法
US8129979B2 (en) Arrangement for lightning detection at a wind turbine
JP4211924B2 (ja) 雷撃電流観測装置
JP6628395B2 (ja) 外部雷保護システム、風車ブレード、及び風力発電装置
CN108508358A (zh) 一种在线的风电机组双信号故障诊断装置及诊断方法
CN204984740U (zh) 风力发电机塔筒结构监测系统
JP2019120219A (ja) 風車ブレードの落雷判定システム及び方法
CN1987500A (zh) 电位法架空线路在线监测系统的方法
JP6851053B2 (ja) ダブルダウンコンダクタシステム、ダブルダウンコンダクタシステム用の健全性評価システム、及び風力発電装置
KR20210033202A (ko) 산업 기계/설비 고장 예측 시스템
CN210430373U (zh) 实时监测碳刷长度的监测装置及包括其的碳刷和风电机组
JP2019039411A (ja) ダウンコンダクタの健全性検出システムを有する風車
CN111929490A (zh) 一种避雷器雷击动作的远程监测装置
EP3117098A1 (fr) Système de mesure de foudre pour une turbine éolienne
CN102619703A (zh) 一种风力发电机上的防雷在线监测装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200880127569.7

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08867468

Country of ref document: EP

Kind code of ref document: A1

REEP Request for entry into the european phase

Ref document number: 2008867468

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2008867468

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 12810666

Country of ref document: US

Ref document number: 3964/CHENP/2010

Country of ref document: IN

NENP Non-entry into the national phase

Ref country code: DE